[postgis-users] PostGIS 2.0 - network topology - crosses edges (SQL/MM: Topo-Net: NEDNODE, NEDLINK)

[Chris English]

Hi Sandro,
Approximately how much time/money would you project to enable SQL/MM Network Topology?
Thanks,Chris

> Date: Tue, 24 Jan 2012 09:34:21 +0100
> From: willi8345 at web.de
> To: postgis-users at postgis.refractions.net
> Subject: Re: [postgis-users] PostGIS 2.0 - network topology - crosses edges (SQL/MM: Topo-Net: NEDNODE, NEDLINK)
> 
> Hi Sandro,
> Thank you very much for your quick response - helps me a lot!!
> Best wishes, willi
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: "Sandro Santilli" <strk at keybit.net>
> Gesendet: 24.01.2012 09:03:01
> An: "PostGIS Users Discussion" <postgis-users at postgis.refractions.net>
> Betreff: Re: [postgis-users] PostGIS 2.0 - network topology - crosses edges (SQL/MM: Topo-Net: NEDNODE, NEDLINK)
> 
> >On Tue, Jan 24, 2012 at 08:52:54AM +0100, willi8345 at web.de wrote:
> >> Hi,
> >>
> >> I'm trying to build a linear application (topology network) with PostGIS
> >> 2.0.0SVN.
> >>
> >> My real world situation has crosses edges with no nodes (water lines or
> >> hiqh voltage power lines in different heights or levels, where both edges
> >> have nothing to do with each other).
> >>
> >> Topo-Geo assumes full planar topology and gives me an error on this
> >> crossing edges.
> >> (SQL/MM Spatial exception - egometry crosses an edge)
> >>
> >> The only possiblity I see at the moment to build it up in different
> >> topology schemas, which would be ok for example between water lines and
> >> low voltage cables, but not between high voltage power lines themselves.
> >>
> >> Is it possible with PostGIS 2.0 (at the moment) to build up this situation
> >> within on topology schema?
> >>
> >> If yes - how?
> >> If no - will it come up in future versions?
> >
> >Not possible with Topo-Geo. As you point out SQL/MM Topo-Geo assumes planar
> >topology. But SQL/MM Network-Topology will let you model your network.
> >
> >Network-topology is not available in 2.0, but could surely come up in
> >future versions if anyone will be investing time / money on it.
> >
> >--strk;
> >
> > () Free GIS & Flash consultant/developer
> > /\ http://strk.keybit.net/services.html
> >_______________________________________________
> >postgis-users mailing list
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> 
> 
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